Java写的一个简易的多客户聊天程序 用户发送信息后不停抛出EOFException
0
悬赏园豆：30
[已关闭问题]
关闭于 2015-12-14 21:04
1 //MessengerServer.java 2 3 4 import java.util.*; 5 import java.net.*; 6 import java.io.*; 7 8 public class MessengerServer { 9 public void startServer(){ 10 try{ 11 ServerSocket serverSocket = new ServerSocket(8000, 100); 12 System.out.println("服务器已启动..."); 13 14 while(true){ 15 Socket clientSocket = serverSocket.accept(); 16 17 System.out.println("已接收到客户来自：" +clientSocket.getInetAddress()); 18 19 ChatHandler handler = new ChatHandler(clientSocket); 20 handler.start(); 21 } 22 23 }catch(IOException ioException){ 24 ioException.printStackTrace(); 25 } 26 } 27 28 public static void main(String[] args){ 29 MessengerServer application = new MessengerServer(); 30 application.startServer(); 31 } 32 }
1 //ChatHandler.java 2 3 import java.io.*; 4 import java.net.*; 5 import java.util.*; 6 7 public class ChatHandler implements Runnable{ 8 9 protected Socket socket; 10 protected ObjectInputStream dataIn; 11 protected ObjectOutputStream dataOut; 12 protected Thread listener; 13 protected static Vector handlers = new Vector(); 14 private boolean keepListening = true; 15 16 public ChatHandler (Socket socket){ 17 this.socket = socket; 18 } 19 20 public synchronized void start(){ 21 if(listener == null){ 22 try{ 23 dataIn = new ObjectInputStream(socket.getInputStream()); 24 dataOut = new ObjectOutputStream(socket.getOutputStream()); 25 26 listener = new Thread(this); 27 listener.start(); 28 }catch(IOException ioException){ 29 ioException.printStackTrace(); 30 } 31 } 32 } 33 34 public synchronized void stop(){ 35 if(listener != null){ 36 try{ 37 if(listener != Thread.currentThread()) 38 listener.interrupt(); 39 listener = null; 40 dataOut.close(); 41 socket.close(); 42 }catch(IOException ignored){ 43 } 44 } 45 } 46 47 public void run(){ 48 String message = ""; 49 try{ 50 handlers.addElement(this); 51 while(keepListening){ 52 message = (String)dataIn.readObject(); 53 54 if(message.equals("DISCONNECT")){ 55 dataOut.writeObject(message); 56 dataOut.flush(); 57 stopListening(); 58 }else 59 broadcast(message); 60 } 61 }catch(ClassNotFoundException classNotFoundException){ 62 63 }catch(EOFException ignored){ 64 65 }catch(IOException ex){ 66 if(listener == Thread.currentThread()) 67 ex.printStackTrace(); 68 }finally{ 69 handlers.removeElement(this); 70 } 71 72 try{ 73 dataIn.close(); 74 }catch(IOException ioException){ 75 ioException.printStackTrace(); 76 } 77 78 stop(); 79 } 80 81 protected void broadcast(String message){ 82 synchronized (handlers){ 83 Enumeration enumer = handlers.elements(); 84 while(enumer.hasMoreElements()){ 85 ChatHandler handler = (ChatHandler)enumer.nextElement(); 86 try{ 87 handler.dataOut.writeObject(message); 88 handler.dataOut.flush(); 89 }catch(IOException ex){ 90 handler.stop(); 91 } 92 } 93 } 94 } 95 96 public void stopListening(){ 97 keepListening = false; 98 } 99 }//end class ChatHandler
1 //MessengerClient 2 3 import java.io.*; 4 import java.net.*; 5 import java.awt.*; 6 import java.awt.event.*; 7 import javax.swing.*; 8 import javax.swing.border.*; 9 10 11 public class MessengerClient extends JFrame implements Runnable{ 12 13 private JTextArea messageArea; 14 private JTextArea inputArea; 15 16 private JButton connectButton; 17 private JButton disconnectButton; 18 private JButton sendButton; 19 private JLabel statusBar; 20 21 private String userName; 22 private String chatServer; 23 private ObjectOutputStream output; 24 private ObjectInputStream input; 25 26 private Socket client; 27 private boolean connected; 28 private Thread processConnection; 29 30 public MessengerClient(String host){ 31 super("聊天客户端"); 32 chatServer = host; 33 34 connectButton = new JButton("登陆"); 35 connectButton.setEnabled(true); 36 ActionListener connectListener = new ConnectListener(); 37 connectButton.addActionListener(connectListener); 38 //代码1 //创建登陆按钮并设置事件侦听器 39 40 disconnectButton = new JButton("退出"); 41 disconnectButton.setEnabled(false); 42 ActionListener disconnectListener = new DisconnectListener(); 43 disconnectButton.addActionListener(disconnectListener); 44 45 messageArea = new JTextArea(); 46 messageArea.setEditable(false); 47 messageArea.setWrapStyleWord(true); 48 messageArea.setLineWrap(true); 49 50 JPanel messagePanel = new JPanel(); 51 messagePanel.setLayout(new BorderLayout(10, 10)); 52 messagePanel.add(new JScrollPane(messageArea), BorderLayout.CENTER); 53 54 inputArea = new JTextArea(4, 20); 55 inputArea.setWrapStyleWord(true); 56 inputArea.setLineWrap(true); 57 inputArea.setEditable(false); 58 59 sendButton = new JButton("发送"); 60 sendButton.setEnabled(false); 61 sendButton.addActionListener( 62 new ActionListener(){ 63 public void actionPerformed(ActionEvent event){ 64 sendMessage(userName + ">" + inputArea.getText()); 65 inputArea.setText(""); 66 } 67 }); 68 69 JPanel buttonPanel = new JPanel(); 70 buttonPanel.setLayout(new GridLayout(3, 1)); 71 buttonPanel.add(sendButton); 72 buttonPanel.add(connectButton); 73 buttonPanel.add(disconnectButton); 74 75 Box box = new Box(BoxLayout.X_AXIS); 76 box.add(new JScrollPane(inputArea)); 77 box.add(buttonPanel); 78 79 messagePanel.add(box, BorderLayout.SOUTH); 80 81 statusBar = new JLabel("离线"); 82 statusBar.setBorder(new BevelBorder(BevelBorder.LOWERED)); 83 84 Container container = getContentPane(); 85 86 container.add(messagePanel, BorderLayout.CENTER); 87 container.add(statusBar, BorderLayout.SOUTH); 88 89 addWindowListener( 90 new WindowAdapter(){ 91 public void windowClosing(WindowEvent event){ 92 if(connected){ 93 sendMessage("DISCOUNNECT"); 94 do{ 95 }while(connected); 96 } 97 System.exit(0); 98 } 99 }); 100 101 } 102 103 public void sendMessage(String message){ 104 try{ 105 output.writeUTF(message); //代码2 //发送message到output对象 106 output.flush(); 107 }catch(IOException ioException){ 108 ioException.printStackTrace(); 109 } 110 } 111 112 public void run(){ 113 String message = ""; 114 do{ 115 try{ 116 message = (String)input.readObject(); 117 }catch(ClassNotFoundException classNotFoundException){ 118 displayMessage("\n收到异常对象类型"); 119 }catch(EOFException eofException){ 120 System.err.println("连接终止"); 121 }catch(IOException ioException){ 122 ioException.printStackTrace(); 123 } 124 if(message.equals("DISCONNECT")){ 125 try{ 126 input.close(); //代码3 //关闭输入输出流 127 client.close(); 128 }catch(IOException ioException){ 129 ioException.printStackTrace(); 130 } 131 connected = false; 132 }else 133 displayMessage(message + "\n"); 134 }while(connected); 135 } 136 137 private class ConnectListener implements ActionListener{ 138 public void actionPerformed(ActionEvent event){ 139 try{ 140 client = new Socket(chatServer, 8000); 141 output = new ObjectOutputStream(client.getOutputStream()); 142 output.flush(); 143 input = new ObjectInputStream(client.getInputStream()) ;//代码4 //创建对象输入流 144 }catch(IOException ioException){ 145 ioException.printStackTrace(); 146 } 147 userName = JOptionPane.showInputDialog(null, "请输入用户名"); //使用JOptionPane弹出输入对话框 148 149 messageArea.setText(""); 150 connectButton.setEnabled(false); 151 disconnectButton.setEnabled(true); 152 153 sendButton.setEnabled(true); 154 inputArea.setEditable(true); 155 inputArea.requestFocus(); 156 statusBar.setText("在线：" + userName); 157 connected = true; 158 159 processConnection = new Thread(MessengerClient.this); 160 processConnection.start(); 161 } 162 } 163 164 private class DisconnectListener implements ActionListener{ 165 public void actionPerformed(ActionEvent event){ 166 sendMessage("DISCOUNNECT"); 167 168 sendButton.setEnabled(false); 169 disconnectButton.setEnabled(false); 170 171 inputArea.setEditable(false); 172 connectButton.setEnabled(true); 173 174 statusBar.setText("离线"); 175 } 176 } 177 178 private void displayMessage(final String messageToDisplay){ 179 SwingUtilities.invokeLater( 180 new Runnable(){ 181 public void run(){ 182 messageArea.append(messageToDisplay); 183 messageArea.setCaretPosition( 184 messageArea.getText().length() ); 185 } 186 } 187 ); 188 } 189 public static void main(String[] args) { 190 MessengerClient application; 191 192 if(args.length == 0) 193 application = new MessengerClient("127.0.0.1"); 194 else 195 application = new MessengerClient( args[0]); 196 197 application.setSize(300, 400); 198 application.setResizable(false); 199 application.setVisible(true); 200 201 } 202 203 }
只有以上3个文件，当我登入一个用户，发送任意信息（数字或字符或空白）都会不停地输出“连接终止”，如下图：
我觉得是MessengerClient.java第120行抛出异常输出的结果，不知该如何解决
